Essex · England
Window Mastic in Gilston
Mastic around window and door frames, sills and patio doors in Gilston, with a one-year guarantee on every job. Ask us for a quote.
- Draughts coming in around windows and doors
- Water coming in at the bottom corners of a door
- White mastic on grey or black frames
Window mastic in Gilston, done properly
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through and quietens the whistle on windy days. Where the air is getting in through the window itself, we will say so. If you have mastic that has split away from the wall and rushed sealant from a window installation, we can put it right, whatever the surface.
Around Gilston, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
Your job is guaranteed for a year, as with all our work.
- Location
- Gilston (CM20)
- Wider area
- Essex
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What we are called out for in Gilston
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Any of these means the joints need attention:
- Whistling draughts around closed windows
- Mastic that has split away from the wall
- Untidy mastic left by window fitters
- Old mastic that has gone black or come away
Homes close to Parish Church of St Mary include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before booking
- Whether all the old sealant comes out first
- Which colour the sealant will be
- What insurance they hold
- What product goes in the joint
Window mastic in Gilston: local notes
With historic houses such as Much Hadham Palace (about 4.8 miles north) nearby, there’s older building stock in the area around Gilston as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Gilston is part of Harlow, one of the post-war new towns. Many homes date from the post-war decades, and many will have had their original windows replaced. That mastic ages as well, and sills and frame heads are where leaks start.
Letting a property close to Harlow Town station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Schools such as St Alban's Catholic Academy are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Gilston is about 2 miles north-west of Harlow, in Essex. Every kind of property in Gilston is covered for window mastic. Every job comes with our one-year guarantee. Gilston is one of 644 places in Essex we cover for window mastic. Chelmsford is on our list too, around 17 miles away.
Jobs for window mastic in CM20 works the same way as everywhere else we cover. Local streets include Pye Corner and Eastwick Road. Nearby, we also carry out window mastic in Eastwick (1 mile south-west), Little Parndon (1 mile south-west), Great Parndon (2 miles south), Staple Tye (3 miles south) and Roydon (3 miles south-west). Further out, we also cover Brentwood (14 miles south-east), Loughton (10 miles south), Waltham Abbey (8 miles south-west), Great Dunmow (13 miles north-east), Epping (6 miles south) and Stansted Mountfitchet (9 miles north-east).
Around Gilston
We work in homes and buildings around The Plume Of Feathers pub, Burnt Mill Academy and Harlow Marsh and the streets around them. The closest station to Gilston is Harlow Town station, about 0.6 miles south of the centre. Other landmarks nearby include Mark Hall Cycle Museum (1.3 miles south-east) and Harlow Mill (1.2 miles east). The countryside around Gilston includes Hunsdon Mead.
What we cannot put right
We will not take on work that will not last, so here’s what sealant can’t put right:
- Worn gaskets, brush seals or a door that has dropped
- A sash or casement that won’t close properly
- Condensation trapped between the panes
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
Joints and surfaces we work on
- Composite doors
- Timber windows & doors
- Window sills
- uPVC windows
- Aluminium frames
- Patio & French doors
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Different surfaces, different methods
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
Landlord and commercial work in Gilston
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
What happens on the day
You don’t need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours for a few frames, or a day or more for a whole house for a typical job. Somewhere like Gilston needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Clear items away from the joints we’re working on
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
Ask for a quote
We quote each job on its own. Simply ring 0345 464 0079 or drop us an email and describe the job.
Read more
How we quote for window mastic
We don’t publish a price list, because jobs vary so much. The quote depends on:
- Whether the work is at height
- Any mould that needs treating
- The number and length of the joints
- Any working-time requirements on site
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What to tell us for a quote
When you contact us, these details help:
- Whether it’s a home or a business
- The problem you’ve noticed
- The address or postcode of the job
- How we’d reach the joints
We do not publish a price list. Instead, we give you a clear price for your job. To arrange one, ring 0345 464 0079 or email us.
Gilston: your questions answered
Should the sealant in an older Gilston home be renewed?
Often, yes: cracked, shrunken or mouldy sealant has done its job. The key is cutting all the old sealant out, as new sealant will not bond to it.
Can you help a landlord with a rental near Harlow Town station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Is it OK to seal over old sealant?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
How long does it take to reseal the windows on a house?
Allow a few hours for a few frames, or a day or more for a whole house. Access and the amount of old mastic make the biggest difference.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.